Texture Image Material is flipping the PNG file I Input
You're probably looking at the "back" of the plane, then.

To fix this, pick any one of the below options:


Mirror the plane on the X-axis. Do this with SX-1Enter or CtrlMXEnter.
Flip the plane's normals. Press Tab to enter Edit Mode, press A to select all vertices, and then look in the tool shelf at left for Flip Direction under the Normals subheading (it's about halfway down the list).
Flip your camera around. Put the 3D cursor at the center of the scene, change the pivot point to 3D Cursor by pressing . (period), and press RZ180Enter
Create a UV map. This is probably the best and most flexible solution, but it requires a little more work. Press Tab to enter Edit Mode, select all the vertices with A, and, since it's only a plane, simply press U and select Unwrap. Then, in the UV/Image Editor, you can move the UV vertices to make your texture display correctly.